JP2764573B2 - A device that embeds a cylindrical casing in the ground - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for embedding a tubular casing in the ground, and more particularly, to an apparatus suitable for embedding a tubular casing to be a starting shaft or a reaching shaft in a ground when a pipe propulsion method is carried out. The present invention relates to a device for pulling a tubular casing embedded in the ground from the ground.

[0002]

2. Description of the Related Art On both sides of a chucking mechanism which is supported movably in the vertical direction by holding a cylindrical casing, a swinging mechanism is arranged via a swinging arm, respectively.
There is a tubing device having a guide roller attached to one of the swing arm and the swing mechanism and sliding with respect to the other (Japanese Patent Publication No. 57-19249). In this device, the tubular casing is buried in the ground while the tubular casing is grasped by the chucking mechanism and the tubular casing is pivoted in the circumferential direction by the swing mechanism and the swing arm.

[0003]

In the above device, the swing arm is disposed radially outward of the chucking mechanism and substantially concentrically with the chucking mechanism, and the swinging mechanism is further outwardly disposed. Have been. The guide roller is in contact with the outer peripheral surface of the swing arm. Therefore, since the chucking mechanism is not directly supported by the guide roller and the guide roller is located away from the chucking mechanism, when the tubular casing grasped by the chucking mechanism is embedded in the ground, the cylindrical casing is It is difficult to keep the center of the map exactly. In addition, since a pair of quite large swing arms is located outside the chucking mechanism, the entire apparatus is enlarged.

[0004] In view of the above, a device for embedding a cylindrical casing in the ground has been separately proposed (Japanese Patent Application No. 7-352892).
In this device, a base that can penetrate the cylindrical casing is disposed on the ground, and a frame that can penetrate the cylindrical casing is disposed above the base so as to be able to move up and down with respect to the base. The chuck disposed on the frame, which can be inserted and releasable from the cylindrical casing, is concentric with the cylindrical casing when the cylindrical casing is inserted, and is swingable in a circumferential direction. . Means for swinging the chuck in one direction and the opposite direction opposite to the circumferential direction is provided, and further, when the chuck is inserted into the cylindrical casing, the chuck comes into contact with the outer peripheral surface of the chuck to thereby fix the chuck. A plurality of guide rollers for guiding in the circumferential direction are arranged at intervals in the circumferential direction.

[0005] The apparatus according to the above proposal can achieve the original purpose, but since a frame is arranged above the base so as to be able to move up and down, and a chuck is arranged on this frame and the chuck is moved up and down by the frame, a large-sized apparatus is required. The weight is heavy because of the frame, and the number of parts is increasing.

The present invention provides an apparatus for embedding a cylindrical casing in the ground, which can maintain the center of the cylindrical casing at an accurate position and thereby maintain the verticality of the embedded cylindrical casing with high accuracy. I do.

According to the present invention, the weight of the entire apparatus can be reduced.
Provided is an apparatus for embedding a tubular casing in the ground, which can reduce the number of parts and can reduce the size of the apparatus.

[0008]

SUMMARY OF THE INVENTION The present invention is an apparatus which is installed on the ground and embeds a tubular casing in the ground. The device includes a base disposed on the ground and capable of penetrating the tubular casing. A chuck is arranged above the base. The chuck is
The tubular casing can be sandwiched and releasable, and is concentric with the tubular casing when the tubular casing is sandwiched. A means for raising and lowering the chuck is supported by the base, and a means for swinging the chuck in one circumferential direction and the opposite direction is supported by the base. A plurality of guide rollers are circumferentially spaced on the chuck and protrude radially outward. The same number of guides as the guide rollers for guiding the guide rollers in the circumferential direction and the vertical direction are supported by the base corresponding to the respective guide rollers.

[0009] A marking is previously made on the ground on which the cylindrical chuck is to be embedded. This marking is aligned with the marking previously written on the base, the base is placed on the ground, and the cylindrical casing is guided to the chuck from above the chuck. And the chuck is concentric with the tubular casing. When the plurality of guide rollers of the chuck come into contact with the guides, the tubular casing becomes swingable at a predetermined position. The ground that is to be inside the cylindrical casing is excavated in advance with a shovel machine, and while the cylindrical casing is rocked in the circumferential direction by the rocking means, or while excavating the ground, the cylindrical casing is removed. When the chuck is lowered by the lifting means while swinging, the tubular casing is embedded in the ground.

A plurality of guide rollers provided on the chuck are in direct contact with the guides, and the guide rollers are guided by the guides when the chuck swings in the circumferential direction.
There is no movement of the chuck. Therefore, the position of the center of the cylindrical casing can be accurately maintained. Thereby, the verticality of the cylindrical casing to be embedded can be maintained with high accuracy. Further, since the chuck is directly moved up and down by the elevating means, a heavy frame is not required, so that the entire apparatus can be reduced in weight and the number of parts can be reduced. In addition, since a plurality of guide rollers are attached to the chuck and guided by a guide of the base, and a swinging means and a lifting / lowering means are attached to the chuck and a device for embedding a cylindrical casing in the ground is formed, the entire device is formed. Can be miniaturized, and the device can have a simple structure.

The oscillating means comprises two hydraulic cylinder devices, wherein the extension operation of one hydraulic cylinder device gives the one-way movement to the chuck, and the extension operation of another hydraulic cylinder device applies the movement to the chuck. Preferably, it comprises two hydraulic cylinder devices arranged to provide opposing movements, one end of each being pivotally connected to the base. In this case, the chuck includes a first chuck piece, a second chuck piece, and a third chuck piece each formed in an arc shape concentric with the cylindrical casing.
And an open / close jack. One end of the first chuck piece is pivotally connected to the other end of one of the two hydraulic cylinder devices, and the other end of the first chuck piece is connected to the two hydraulic cylinder devices. Another other end of the cylinder device is pivotally connected. One end of the second chuck piece is pivotally connected to the one end of the first chuck piece, and one end of the third chuck piece is connected to the one end of the first chuck piece. It is pivotally connected to the other end. The opening / closing jack connects the other end of the second chuck piece and the other end of the third chuck piece so that they can approach and separate from each other.

According to this aspect, when one hydraulic cylinder device performs an extension operation, another one hydraulic cylinder device performs a contraction operation, and when one hydraulic cylinder device performs a contraction operation, another one hydraulic cylinder device performs a contraction operation. By controlling the one hydraulic cylinder device to perform the extension operation, it is possible to effectively use the two hydraulic cylinder devices and obtain a large swinging power. In addition, since the first chuck piece is connected to the two hydraulic cylinder devices, the first chuck piece can be guided to an appropriate position by the two hydraulic cylinder devices. The appropriate position is such a position that when the outer peripheral surface of the cylindrical casing is brought into contact with the arc surface of the first chuck piece, the center axis of the cylindrical casing is at a correct position with respect to the ground to be embedded. As a result, the center of the cylindrical casing can be accurately positioned only by applying the cylindrical casing to the first chuck piece. After the positioning of the cylindrical casing, when the second chuck piece and the third chuck piece are operated so as to be closed by the opening / closing jack, the chuck sufficiently sandwiches the cylindrical casing and firmly holds the cylindrical casing.

When the chuck comprises three chuck pieces and an opening / closing jack, the plurality of guide rollers are:
It is distributed to a first chuck piece, a second chuck piece, and a third chuck piece. In this case, the guides corresponding to the guide rollers of the first chuck piece are fixedly attached to the base, and the guides respectively corresponding to the guide rollers of the second chuck piece and the third chuck piece are attached to the base. It is supported so that it can move back and forth in the horizontal direction.

Since the first chuck piece is connected to the two hydraulic cylinder devices and the guide roller of the first chuck piece is guided by a fixedly mounted guide, When the guide roller contacts the guide, the first chuck piece is in the proper position. Thus, it is easy to guide the first chuck piece to an appropriate position. Further, since the guides respectively corresponding to the guide roller of the second chuck piece and the guide roller of the third chuck piece can advance and retreat in the horizontal direction, when the cylindrical casing is guided to the chuck and inserted there, the guides are formed. After the escape and the insertion of the cylindrical casing, the guide can be brought into contact with the guide roller of the chuck to guide the chuck. This allows the chuck to be formed so that it can be inserted into and released from the cylindrical casing, while the guide roller on the outer peripheral surface of the chuck can be brought into contact with the guide. Can be reduced in size.
The guide roller of the second chuck piece and the guide roller of the third chuck piece are formed so as to be able to advance and retreat in the radial direction, while the guide on the base corresponding to these guide rollers is fixedly provided. The effect can be achieved. Although the present invention does not exclude this, the entire structure can be simplified by forming the guide so that it can advance and retreat.

It is preferable that a second base is provided which is detachable from the base and on which a counterweight can be placed. This reduces the size of the base, attaches the second base to the base at the site of embedding the cylindrical casing, and places the counterweight thereon,
The reaction force at the time of embedding a cylindrical casing can be received.

The device is used to pull out a tubular casing embedded in the ground. Thus, the operation of embedding the cylindrical casing and the operation of pulling out the embedded cylindrical casing can be performed only by the device for embedding the cylindrical casing in the ground.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION An apparatus for embedding a cylindrical casing in the ground includes a base, a chuck, elevating means, swinging means, a plurality of guide rollers, and a guide, and is installed on the ground. The base is formed to penetrate the cylindrical casing.

The chuck is disposed above the base so as to be releasable and releasable with respect to the cylindrical casing. The chuck is concentric with the cylindrical casing when the cylindrical casing is clamped. The guide roller is attached to each chuck piece in a radially outward direction. 1 out of 3 chuck pieces
One chuck piece connects each end of the chuck piece to each of two hydraulic cylinder devices of both ends clevis type which are swing means so as to be rotatable around a horizontal axis. 2 remaining
The two chuck pieces are each pivotally connected to two ends of the one chuck piece about a vertical axis.
The free ends of the two chuck pieces are connected by an opening / closing jack. Although the inside diameter of the chuck is constant, various casings having various outside diameters can be embedded by bolting three chuck attachment switches having different inside diameters to the corresponding chuck pieces. Each chuck attachment can be formed in a sector shape.

Guides corresponding to the guide rollers of two chuck pieces except one chuck piece connected to the swinging means are mounted on the base so as to be able to advance and retreat in the horizontal direction.
On the other hand, the chuck piece connected to the swinging means preferably has a plurality of guide rollers, and the guide facing these guide rollers is fixedly attached to the base.
The guide has an arc-shaped inner peripheral surface that is concentric with the inner peripheral surface of the chuck when the fixed one is at that position and the movable one is at the regular position. The height of the guide in the vertical direction is higher than the vertical stroke of the chuck.

The lifting means can be formed by three or four hydraulic cylinder devices. In one embodiment, each hydraulic cylinder device is a double-ended clevis type. For example, the piston rod is connected to a chuck by a clevis, the cylinder of each hydraulic cylinder device is connected to a connecting frame by a clevis, and the connecting frame is fixed to the base. . In another aspect, each hydraulic cylinder device is a clevis type at one end,
For example, the piston rod is connected to a base via a spherical bush, the cylinder of each hydraulic cylinder device is connected to a connection frame by a clevis, and the connection frame is fixed to a chuck. In the former embodiment, the total length of the connecting frame is made longer than the total length of the connecting frame in the latter embodiment.

The two hydraulic cylinder devices of the oscillating means are of the clevis type at both ends, and are arranged on the base such that their axes are substantially tangential to the outer periphery of the chuck sandwiching the cylindrical casing in plan view. In front view,
The base is pivotably connected about a horizontal axis substantially at the center between the upper and lower limits of the elevation of the chuck. The two hydraulic cylinder devices can be arranged symmetrically at a position 180 ° circumferentially away from the chuck, or at other positions. However, for convenience of transporting the device by truck, as in the embodiment, It is preferable to arrange them.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An apparatus for embedding a tubular casing 10 in the ground is disposed on the ground as shown in FIGS.
A base 12 capable of penetrating the cylindrical casing, a chuck 14 disposed above the base 12, an elevating means 16 for elevating the chuck 14, an oscillating means 18 for oscillating the chuck 14, and a plurality of guides The vehicle includes a roller 20 and a guide 22.

The base 12 is formed of a channel steel so that its shape in plan view is rectangular. The base 12 may include air jacks (not shown) for level adjustment at four corners. The air jack is flat and the level is adjusted by lifting the base by air pressure.

In the embodiment shown, the second bases 24, 2
5 is detachably attached to the base 12. The bases 24 and 25 have an inverted L-shaped bolt mounting portion 26 on the side facing the base 12. Bolt mounting part 26
Is mounted on the base 12, and the bolts 27 screwed into the bolt mounting portions 26 are pressed against the base 12, and the bases 24 and 25 are attached to the base 12. As a result, the base 24,
When the counterweight 28 is placed on the base 25, a downward load is applied to the base 12, so that the reaction force when the tubular casing is embedded can be received.
Since the bases 24 and 25 can be separated from the base 12, the bases 24 and 25 can be transported separately from the device for embedding the tubular casing, and the base 12 can be reduced accordingly.

The chuck 14 is capable of being inserted into the tubular casing 10 and releasable, and is disposed above the base 12. The chuck 14 is used for the cylindrical casing 1.
It is formed so as to be concentric with the cylindrical casing when 0 is inserted. In the illustrated embodiment, the chuck 14 is formed so as to sandwich a cylindrical casing having an inner diameter of 2032 mm. Various cylindrical casings can be handled by bolting a chuck attachment (not shown) having an inner peripheral surface different from the inner peripheral surface of the chuck 14 to a chuck piece described later. The chuck 14 is swingable in the circumferential direction with the cylindrical casing sandwiched therebetween. The oscillating means 18 oscillates the chuck 14 in one direction A in the circumferential direction and in the opposite direction B, which is the opposite direction.

In the illustrated embodiment, the chuck 14 includes a first chuck piece 30 and a second chuck piece 32, each of which is formed in an arc shape concentric with the cylindrical casing 10.
, A third chuck piece 34, and an opening / closing jack 36. At the end 38 of the first chuck piece 30,
One end of two hydraulic cylinder devices of the oscillating means 18 to be described later is pivotally connected around a horizontal axis, and an end 39 of the first chuck piece 30 is connected to another of the two hydraulic cylinder devices. Has one end pivotally connected about a horizontal axis. End 40 of second chuck piece 32
Is rotatably connected to the end 38 of the first chuck piece 30 by a pin around a vertical axis. And
The end 42 of the third chuck piece 34 is connected to the end 39 of the first chuck piece 30 by a pin so as to be pivotable about a vertical axis. Furthermore, opening and closing jack 36
Connect the end 41 of the second chuck piece 32 and the end 43 of the third chuck piece 34 with pins so that they can approach and separate from each other. Opening and closing jack 36
Is a hydraulic cylinder device, and the second chuck piece 32 and the third chuck piece 34 respectively pivot or swing around a connection portion with the first chuck piece 30 during extension operation and contraction operation.

The elevating means 16 comprises three hydraulic cylinder devices 4
6 and each hydraulic cylinder device 46 is associated with one chuck piece. Referring to FIGS. 3 and 4, which show details of the hydraulic cylinder device 46, the cylinder 4
8 is a clevis type having both ends and a piston rod 50. The piston rod 50 is pivotally connected to the chuck 14 by a clevis 52 and a pin 53 around a horizontal axis, and the cylinder 48 is connected to a connection frame 56 by a clevis 54 and a pin 55 so as to be pivotable around a horizontal axis. I have. The connection frame 56 is bolted to the base 12. A prying force is applied to the hydraulic cylinder device 46 when the chuck 14 is rocked by the rocking means 18 described later, and this force is received by the two clevises 52 and 54. In other words, the height of the connecting frame 56 is determined to such an extent that the twisting force does not substantially affect. Each hydraulic cylinder device 46 has, for example, a maximum pressure input of 10 to 20 tons.
, Maximum pulling force is 40-60ton, Elevating stroke is 300
It can be set to be ~ 600mm.

The oscillating means 18 comprises two hydraulic cylinder devices 60 and 62 of a double-ended clevis type, each having one end mounted on the base 12 so as to be pivotable about a horizontal axis. In these hydraulic cylinder devices 60 and 62, the extension operation of one hydraulic cylinder device 60 gives the chuck 14 one-way A movement, and the extension operation of another hydraulic cylinder device 62 gives the chuck 14 the opposite direction B movement. It is arranged as follows. In this case, the mounting point 61 of each hydraulic cylinder device with the base 12 is further adjusted so that the direction in which the piston rod of each hydraulic cylinder device extends is substantially tangential to the chuck 14 in plan view. It is preferable to arrange the hydraulic cylinder devices 60 and 62 in consideration of the outer diameter of the chuck 14 so as to be substantially at the center of the lifting stroke. The swing means 18
For example, the swing torque can be set to be 40 to 60 ton-m.

The plurality of guide rollers 20
When the cylindrical casing 10 is inserted, the chuck contacts the guide 22 and guides the chuck 14 in the circumferential direction. The chuck 14 is disposed so as to protrude outward in the radial direction at intervals in the circumferential direction.

In the illustrated embodiment, three guide rollers 2
0, and one guide roller 20 is arranged on one chuck piece. Each guide roller 20
Are two rollers 2 rotatable about a vertical axis, respectively.
The rollers 21 are mounted on the chuck piece of the chuck 14 as an assembly. The outer peripheral surface of the roller 21 is preferably spherical.

Three guides 20 are arranged at portions of the base 12 corresponding to the guide rollers 22. Among the three guide rollers 20, a guide 22 corresponding to the guide roller 20 of the chuck piece 30 is fixed to the base 12. On the other hand, the guides 22 respectively corresponding to the guide roller 20 of the chuck piece 32 and the guide roller 20 of the chuck piece 34 can move in the horizontal direction.
The guide 22 has an arc-shaped inner peripheral surface that is concentric with the inner peripheral surface of the chuck 14 when the fixed one is at that position and the movable one is at a regular position. Guide 22
Is determined to be longer than the vertical stroke of the chuck 14.

Referring to FIGS. 3 and 4, the guide 22 which can be moved in the horizontal direction is moved back and forth by a hydraulic cylinder device 66. In the illustrated embodiment, the hydraulic cylinder device 66 is mounted on the connecting frame 56 and the guide 22 mounted on the piston rod of the hydraulic cylinder device 66.
Are welded to two guide plates 68. The two guide plates 68 are slidably supported by a pair of bars 70 respectively attached to the side surfaces of the connection frame 56, and are connected to each other by two vertically spaced rods 72. The rod 72 extends through an elongated hole 74 provided in the connecting frame 56 and extending in the horizontal direction. As a result, the guide 22 is moved in a horizontal direction by the hydraulic cylinder device 66 toward and away from the center of the chuck 14, and when the guide 22 advances toward the chuck 14, the guide 22 is moved by the piston of the hydraulic cylinder device 46. It comes into contact with the two rollers 21 arranged between the rods 50. The hydraulic cylinder device 66 releases the guide 22 so that the two chuck pieces 32 and 34 of the chuck 14 can be opened when the cylindrical casing is attached to and detached from the chuck 14, and has a stroke of, for example, 75 mm.

Referring to FIGS. 5 and 6, another embodiment of the device for embedding the cylindrical casing 10 in the ground is a base 12 which is disposed on the ground and is capable of penetrating the cylindrical casing. Chuck 14 arranged above
This embodiment is the same as the previous embodiment in that it includes a lifting means 80 for lifting and lowering the chuck 14, a swinging means 18 for swinging the chuck 14, a plurality of guide rollers 82, and a guide 84. In this embodiment, the structure of the lifting / lowering means 80, the guide roller 82, and the guide 84 is different from the structure of the above embodiment. Therefore, different structures will be described below, and descriptions of substantially the same structures will be omitted.

The lifting / lowering means 80 comprises four hydraulic cylinder devices 8
6, two hydraulic cylinder devices 86 are provided at both ends of the chuck piece 30 and one hydraulic cylinder device 86
Are associated with each of the chuck pieces 32 and 34. The hydraulic cylinder device 86 is of a clevis type at one end, and its piston rod is connected to the base 12 via a spherical bush 88 so as to be pivotable about a horizontal axis. By the action of the spherical bush 88, the hydraulic cylinder device 86 can also pivot in a direction intersecting the horizontal axis. On the other hand, the cylinder of the hydraulic cylinder device 86 is connected to a connecting frame 90 via a clevis 89 so as to be pivotable about a horizontal axis, and the connecting frame 90 is welded to a chuck piece of the chuck 14. In the case of this embodiment, the connecting frame 9
Since the height of “0” is lower than the height of the connecting frame 56 of the above-described embodiment, a prying force acts on the hydraulic cylinder device 86 when the chuck 14 swings. This prying force is released by the spherical bush 88.

The guide roller 82 has two rollers 83 arranged in parallel and rotatable about a vertical axis, and these rollers 83 are brackets extending radially outward beyond the connecting frame 90. It is supported by. Two guide rollers 82 are attached to the chuck piece 30, and one guide roller 82 is attached to each of the chuck pieces 32 and 34. Guides 84 corresponding to the two guide rollers 82 of the chuck piece 30 are fixed to the base 12.

A guide 84 corresponding to the guide roller 82 of each of the two chuck pieces 32, 34 is moved in a horizontal direction by a clevis-type hydraulic cylinder device 92, as shown in FIGS. Guide 8
4 includes a pair of left and right guide plates 94 welded to each other. The pair of guide plates 94 are connected to the upper connecting plate 9.
6 are interconnected. Each guide plate 9
4 has a slide plate 98 at its lower end. The pair of guide plates 94, the connection plate 96, and the slide plate 98 are inserted into the guide box 100 so as to be able to advance and retreat.

A hydraulic cylinder device 92 is connected to the bottom plate 102 of the guide box 100 by a clevis 93. Each guide plate 94 has two parallel guide grooves 104 inclined downward from the retreating end of the guide 84 in the retreating direction A to the advancing end. A pair of rollers 106 are rotatably attached to a piston rod of the hydraulic cylinder device 92 by a shaft 108, and each roller 106 is disposed in the upper guide groove 104. Further, a pair of links 1
10 extends downward from the shaft 108, and a roller 112 is rotatably attached to the lower end of each link 110. Each roller 112 is disposed in the lower guide groove 104. When the hydraulic cylinder device 92 expands and contracts, the roller 10
6, 112 roll in the guide groove 104 to move the guide 84 forward and backward. The guide box 100 is attached to the base 12 such that the advance / retreat direction C of the guide 84 is parallel to the tangential direction of the chuck 14 with the tubular casing sandwiched therebetween.

The device for embedding the cylindrical casing in the ground operates as follows. Marking is made on the ground where the tubular casing is to be embedded, and this marking and the base 1
The base 1 is aligned with the previously provided marking on the base 2.
After the 2 is placed on the ground and the level of the base 12 is adjusted, necessary spacers are inserted between the ground and the base 12. The second bases 24 and 25 are attached to the base 12, and the counterweight 28 is placed on the bases 24 and 25.
The chuck 14 is raised by the lifting means 16 and 80, and the chuck piece 3 is moved by the opening / closing jack 36.
2 and 34 are kept open, the cylindrical casing 10 hung by a crane from above the chuck 14 is passed through the chuck 14 and guided vertically onto the ground, and the open / close jack 36 of the chuck 14 is closed. As a result, the chuck 14 sandwiches the cylindrical casing 10 and the cylindrical casing 10
In place. As a result, the chuck 14 becomes concentric with the cylindrical casing 10, so that the guides 22 and 84
Is advanced toward the guide rollers 20, 82, the plurality of guide rollers 20, 82 and the guides 22, 84 come into contact with each other.

The ground which is to be inward of the cylindrical casing 10 is excavated by a shovel machine in advance, or the following operation is performed while excavating. While operating the lifting / lowering means 16 and 80 to apply a downward pressure input to the chuck 14, the hydraulic cylinder device 60 of the oscillating means 18 is caused to extend and another hydraulic cylinder device 62 is contracted to cause the chuck 14 to contract. Is swung in one direction A. When the stroke ends of the hydraulic cylinder devices 60 and 62 are reached, the hydraulic cylinder device 60 performs the contracting operation and the hydraulic cylinder device 62 performs the extending operation to move the chuck 14 in the reverse direction B.
Rock. In this manner, the chuck 14 is caused to swing in the circumferential direction, and the guide rollers 20 and 82 are guided by the guides 22 and 84.
, The tubular casing 10 is embedded in the ground by applying a downward pressure input to the chuck 14. When the lifting / lowering means 16, 80 reaches the lower stroke end, the opening / closing jack 36 is opened, the chuck 14 is raised by the lifting / lowering means 16, 80, and the above operation is repeated again.

A device for embedding a cylindrical casing in the ground is as follows:
It can be used to pull out a tubular casing embedded in the ground. It operates as follows. The apparatus is transported to the site so that the chuck 14 surrounds the cylindrical casing 10 to be withdrawn, and the chuck 14 is lowered by the lifting means 16 and 80. The opening / closing jack 36 of the chuck 14 is closed, and the cylindrical casing is sandwiched by the chuck 14.
While applying an upward pulling force to the lifting / lowering means 16 and 80, the rocking means 18 is rocked in the same manner as described above. When the lifting / lowering means 16, 80 reaches the upper stroke end, the opening / closing jack 36 of the chuck 14 is opened and the lifting / lowering means 16, 80
80 is contracted to lower the chuck 14, and the above operation is repeated again.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment of an apparatus for embedding a tubular casing in the ground according to the present invention.

FIG. 2 is a front view of an embodiment of an apparatus for embedding a tubular casing in the ground according to the present invention.

FIG. 3 is an enlarged front view showing a part cut away as seen in the direction of line 3-3 in FIG. 1;

4 is a side view of FIG. 3 with a part cut away.

FIG. 5 is a plan view of another embodiment of the device for embedding a tubular casing in the ground according to the present invention.

FIG. 6 is a front view of another embodiment of the device for embedding a tubular casing in the ground according to the present invention.

FIG. 7 is an enlarged plan view showing a part of the guide shown in FIG.

FIG. 8 is a sectional view taken along line 8-8 in FIG. 7;

FIG. 9 is a sectional view taken along line 9-9 in FIG. 8;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Cylindrical casing 12 Base 14 Chuck 16, 80 Elevating means 18 Swinging means 20, 82 Guide roller 21, 83 Roller 22, 84 Guide 30, 32, 34 Chuck piece 36 Opening / closing jack 60, 62 Hydraulic cylinder device

Claims (5)

(57) [Claims] 1. A device installed on the ground to embed a tubular casing in the ground, comprising: a base disposed on the ground and capable of penetrating the cylindrical casing; and a base disposed above the base. A chuck, which is capable of inserting the cylindrical casing, and is releasable; a chuck which is concentric with the cylindrical casing when the cylindrical casing is inserted; supported by the base; and Means for raising and lowering, swing means supported by the base, which swings the chuck in one direction and the opposite direction in the circumferential direction, and arranged at intervals in the circumferential direction on the chuck, A plurality of guide rollers protruding outward in the radial direction; and the same number of guide rollers as the guide rollers for guiding these guide rollers in the circumferential direction and the vertical direction. An apparatus for embedding a tubular casing in the ground, comprising: a guide supported by the base corresponding to each guide roller. 2. The oscillating means is two hydraulic cylinder devices, wherein an extension operation of one hydraulic cylinder device gives the one-way motion to the chuck, and an extension operation of another hydraulic cylinder device applies to the chuck. The hydraulic device comprises two hydraulic cylinder devices arranged to give the opposite movement, one end of each being pivotally connected to the base, and the chuck is formed in an arc shape concentric with the cylindrical casing. A first chuck piece formed, wherein the other end of one of the two hydraulic cylinder devices is pivotally connected to one end of the first chuck piece; Another one end is the first end.
A first chuck piece pivotally connected to the other end of the chuck piece, and a second chuck piece formed in an arc shape concentric with the cylindrical casing, one end of which is the second chuck piece. A second chuck piece pivotally connected to the one end of the one chuck piece and a third chuck piece formed in an arc shape concentric with the cylindrical casing, one end of which is formed; A third chuck piece pivotally connected to the other end of the first chuck piece, another end of the second chuck piece, and another end of the third chuck piece; 2. The device for embedding a tubular casing in the ground according to claim 1, further comprising: an opening / closing jack that connects the first casing and the second casing so that they can be approached and separated from each other. 3. The plurality of guide rollers are distributed to the first chuck piece, the second chuck piece, and the third chuck piece, respectively, and
The guides corresponding to the guide rollers of the chuck pieces are fixedly attached to the base, and the guides respectively correspond to the guide rollers of the second chuck piece and the guide rollers of the third chuck piece. The device for embedding a tubular casing in the ground according to claim 2, wherein the device is supported by the base so as to be able to advance and retreat in a horizontal direction. 4. A second base detachable from said base and capable of carrying a counterweight thereon.
An apparatus for embedding a tubular casing in the ground according to claim 1. 5. The apparatus according to claim 1, wherein the apparatus is used to pull out a tubular casing embedded in the ground.